Quantum critical point for stripe order: An organizing principle of cuprate superconductivity

TL;DR

This paper proposes that a stripe-order quantum critical point (QCP) is a fundamental organizing principle for hole-doped cuprate superconductors, explaining various phenomena such as Fermi-surface reconstruction and pseudogap behavior.

Contribution

It extends the quantum critical point framework from other superconductors to hole-doped cuprates, unifying key properties through the stripe-order QCP.

Findings

Stripe order and its QCP are central to cuprate properties.

Fermi-surface reconstruction is explained by stripe-order QCP.

The pseudogap phase exhibits nematic character linked to stripe order.

Abstract

A spin density-wave quantum critical point (QCP) is the central organizing principle of organic, iron-pnictide, heavy-fermion and electron-doped cuprate superconductors. It accounts for the superconducting Tc dome, the non-Fermi-liquid resistivity, and the Fermi-surface reconstruction. Outside the magnetically ordered phase above the QCP, scattering and pairing decrease in parallel as the system moves away from the QCP. Here we argue that a similar scenario, based on a stripe-order QCP, is a central organizing principle of hole-doped cuprate superconductors. Key properties of Eu-LSCO, Nd-LSCO and YBCO are naturally unified, including stripe order itself, its QCP, Fermi-surface reconstruction, the linear-T resistivity, and the nematic character of the pseudogap phase.